Hmm...
This concept image shows 4 rows facing backwards and 3 rows facing forwards. Looks like this isn't happening going by what we have seen of the train on the track and the other concept art showing just 1 row reversed. Looks like at one point it was going to be more than one row which is why I guess that some who had already seen the concept are were saying it would be, even though the photos of the train on the track only showed that one was.
Makes me wonder if they did change it to only 1 row to be able to get away with making it an upcharge.